Q1. What is your terms of packing? A: Generally, we pack our goods in neutral white boxes and brown cartons. If you have legally registered patent, we can pack the goods in your branded boxes after getting your authorization letters. Q2. What is your terms of payment? A: T/T 100% advanced payment as the first order. After long-term cooperation, T/T 30% as deposit, and 70% before delivery. We'll show you the photos of the products and packages before you pay the balance. Q3. What is your terms of delivery? A: EXW, FOB CFR, CIF Q4. How about your delivery time? A: Generally, it will take 30 days after receiving your advance payment. If we have a steady relationship, we will stock the raw material for you. It will reduce your waiting time. The specific delivery time depends on the items and the quantity of your order. Q5. Can you produce according to the samples? A: Yes, we can produce by your samples or technical drawings. We can build the molds and fixtures. Q6. What is your sample policy? A: We can supply the sample if we have ready parts in stock, but the customers have to pay the sample cost and the courier cost. Q7: How about the quality of your product? A: Our products are certified to ISO9001/TS16949 and ISO 9000:2015 international quality standards. We have very strict Quality Control Systems.
Bellows are mainly preferred for busses and offer a comfort ride. Used for their ability to set appropriate vehicle height for passengers to get in or out of the vehicle and for a comfort travel. The bellows produced and sold under VKNTECH brands are mainly sold as spare parts in refurbishment market; in case they are used to replace a VKNTECH brand product or they are mounted through mounting parts supplied by VKNTECH approved suppliers, a compatibility between mounting parts are achieved and warranty conditions become valid.| Product name | Air Spring |
| Type | Air Suspension/Air bags/Air Ballons |
| Warranty | 12 Months Guarantee Time |
| Material | Imported Natural Rubber |
| OEM | Avaliable |
| Price condition | FOB China |
| Brand | VKNTECH or customized |
| Package | Standard packing or customized |
| Operation | Gas-filled |
| Payment term | T/T&L/C |
| VKNTECH NUMBER | 2B 3400-3 |
| OEM NUMBERS | Firestone W01-358-3400 Goodyear 2B7-540 |
| WORKING TEMPERATURE | -40°C bis +70°C |
| FAILURE TESTING | ≥3 millions |