Tether Tools AeroTab Universal Tablet System L4 Tether Tools AeroTab L4 Universal Tablet Mounting System with LAJO-4 ProBracket - 1/4"-20 Tripod - Arca - 5/8"(16mm) Baby + 3/8" Thread - 1/4"-20 Receptor - Tether Tools Lifetime Warranty Material: All metal construction Compatibility: Compatible with tablets with a diagonal ranging of 13.5" (343 mm) to 20" (510 mm)Accommodates tablets up to 0.75" (190 mm) thickWorks with tablets using protective cases within the aabove ranges Threading: 1/4"-20 mountArca style receptor attachment5/8" (16 mm) Baby Stud3/8" thread Protection: Non-slip, non-scratch padded protective corners