[Material] Main body EN AW-6063 Equiv.-T5 / Shaft: Stainless steel "EN 1.4301 Equiv. (sintered)" / Cover of main body: Polyamide "PA" / Bearing: Polyacetal "POM." Surface treatment: main body: anodised. Mounting frame: M6 and M8 type * 2 upper and lower parts are included in 1 set * Fixing screws and square nuts are stainless steel. Lift-off. Available for left and right opening