Open Rail, working with v wheel.
1. Aluminum 6063 T5
2. open rail 500mm*10pcs
3. Working with POM delrin v-slot wheel (we have v slot wheel in stock, please take a visit http://www.aliexpress.com/store/product/POM-Dual-V-slot-Wheel-Delrin-for-your-building-Per-Bag/1496079_32240695513.html
4. It's in stock right now, bulk purchasing is welcomed. Please inquiry us via skype:swalwin or email swalwin at gmail.com.
If you need order mass quantity, please check with us on bulk price. swalwin*gmail.com,Thanks.