Based on this product's specifications, here are some alternatives and similar models
Bar clamp Wolfcraft SZ 80-150 — clamp opening 15 cm, depth 80 mm, black/grey
Summary description:
Wolfcraft SZ 80-150 bar clamp with a 15 cm clamp opening and 80 mm depth. Single-piece clamp in black and grey designed for holding, gluing and assembling workpieces in woodworking and DIY projects. Provides adjustable clamping pressure along the bar for securing panels, frames and joints during assembly and adhesive curing.