[DETAIL] Product Name :Hydraulic Excavator Preparation tools: no need to bring your own tools Age-appropriate stage: greater than 8 years old Power demand: manual operation Product use: Exercise the child's manual brain, understand the mechanical structure, learn the hydraulic transmission Principle: Hydraulic transmission is a transmission method that uses pressurized liquid in a closed system to transmit motion and power. It first converts mechanical energy into pressure energy of the liquid, and then The energy of the water passing through the piston and the pressure of the water can be converted into mechanical energy by the pressure energy of the liquid between the subtotals colour:Wood color Material:wood size:50*12*30cm Package Contents: 1* Hydraulic excavator Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. [ATTRIBUTES] - Hign-concerned Chemical: None - Theme: Animals & Nature,Transportation,Occupations,Sports,Music - Warning: no - Hign-concerned Chemical: None - Theme: Animals & Nature,Transportation,Occupations,Sports,Music - Warning: no - Certification: China certified (3C) - Model Number: CFMX121 - Brand Name: U-Angel-1988 - Recommend Age: 14+y - Origin: Mainland China - Certification: CE