uxcell 10mm Thread Stem 2 Inch Dia Double Wheel Brake Swivel Caster 4 Pcs Main Material: Plastic, Metal; Package Content: 4pcs x Thread Stem Caster Wheels; Product Name: Thread Stem Caster Wheel Weight: 315g; Features: Twin Wheel; Main Color: Black,Silver Tone Overall Size: 6 x 4.5 x 8cm/ 2.4" x 1.8" x 3" (L*W*H); Wheel Size: Each: 5 x 1.2cm/ 2" x 0.5"(D*T); Threaded Stem Size: 10 x 15mm(D*L) Wheel Dia(a): 5 cm/2"; Total Length(b): 8 cm/3" Threaded Dia(c): 10 mm; Threaded Length (d): 15 mm/0.6"