Product Name: Ball Transfer Unit; Package Content: 2pcs x Ball Transfer Unit Weight: 230g; Main Material: Metal Overall Size: 31 x 57mm / 1.22" x 2.24"(Max D*L); Ball Diameter: 25mm / 1" Main Color: Silver Tone Thread Size: 7.5 x 20mm / 0.3" x 0.79"(D*L)…