Petzl WILLIAM Carabiner Type:Screw Lock The carbon Service Course SL The carbon Service Course SL seatpost is specifically tuned to be more shock absorbing than the “comfort” seatposts on the market These features create more livable space so you can be more comfortable in the backcountry References M36A TL M36A BL M36A SL M36A TLN M36A SLN Weight 90 g 90 g 85 g 90 g 85 g Locking system TRIACT LOCK BALL LOCK SCREW LOCK TRIACT LOCK SCREW LOCK Color(s) gray gray gray black black Major axis strength 27 kN 27 kN 27 kN 27 kN 27 kN Minor axis strength 8 kN 8 kN 8 kN 8 kN 8 kN Open gate strength 8 kN 8 kN 8 kN 8 kN 8 kN Gate opening 27 mm 27 mm 28 mm 27 mm 28 mm The WILLIAM carabiner is available in three locking systems: automatic TRIACT LOCK or BALL LOCK system